Gang punching-machine.



no. 665,702. Paten'te d Ian. 8, 19m.

' E. B. sTmPspN.

GANG PUNCHING MACHINE.

(Application fl led Mar. 21, 1900.

(No Model.) 7 3 Sheets$heat I.

Fig?! INVENTOR ATTORNEY Patented Ian. 8, 190i.

E. B. .STIMPSON. GANG PUNGHING MACHINE.

(Application filed Mar. 21, 1900.)

3 Sheets-Sheet 2.

(No Model.)

.IIIIIIIII.

INVENTOR ATTORNEY WITNESSES:

(7m Q/Q.

No. 665,702. Patented Ian. 8, I901.

E. B. STIMPSON.

GAP?PUNGHING MACHINE.

(Application filed Mar. 21, 1900.)

(No Model.) 3 Shets8heet 3.

PATEN trier.

EDWIN B. STIMPSON, OF NEW YORK, N. Y.

GANG PUNCHlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 665,702, dated January 8, 1901. Application filed March 21, 1900. Serial No. 9,522. (No model.)

To aZZ whom it may concern:

Be it known that I, EDWIN B. STIMPsoN, a citizen of the United States, residing in the city of New York,borough of Brooklyn,county of Kings, Stateof New York, have invented certain new and useful Improvements in Gang PunchingJl/Iachines, of which the following is a specification This invention relates to reciprocating power-punches; and the object of the invention is to provide a punch or punching-machine wherein the punch-carriers and dies maybe shifted and set with great facility and the punches be removed or interchanged with equal facility and also one in which the construction shall be simple, strong, and durable.

The invention is fully illustrated in the accompanying drawings, wherein Figure 1 is a front elevation of the machine. Fig. 2 is a vertical section at line x in Fig 1. Fig. 3 is a detail view of the pulley and clutch. Fig. 4c is a horizontal section in the plane indicated by line 00 in Fig. 2. Fig. 5 is an en larged sectional detail View showing the punch-guide or guide-block in side elevation and illustrating the operation of the clamping devices, and Fig. 6 is a front elevation of the punch-guide and adjacent parts on the same scale as Fig. 5. Fig. 7 illustrates the punch detached and on a large scale. Fig. 8 is a detail sectional view of the punch-carrier. Fig. 9 is a sectional view similar to Fig. 5, illustrating a slightly-modified form of the clamping device.

1 is a suitable frame having a bed or table 2. In this frame is rotatively mounted a shaft 3, having on it a driving or belt pulley 4. Also in the frame is mounted a treadleshaft 5, provided with a treadle 6. By pressing down the treadle with the feet a clutch device 7 clutches the pulley 4 to the shaft for driving, and when the pressure of the foot is removed the clutch is automatically freed, so as to stop the shaft, but permit the pulley to continue its rotation. On the shaft are two by a bridge-piece 13.

3 imparts reciprocating movements to the sliding frame 11.

The table 2 has an opening or slot along its middle in which is fitted and secured a slotted piece 14, which forms when in place a fixed part of the main frame and table. The slot 15, Figs. 4 and 5, in the piece 14 is planed out, so as to form shoulders 16, and in this slot and supported by said shoulders are mounted sliding die-blocks 17, which carry the dies 18. The slot 15 extends transversely or parallel with the driving-shaft, and the blocks 17 may be shifted anywhere along said slot, and when properly adjusted they may be fixed or clamped by a simple clamping device comprising a clamping-bar 19 in a recess back of the die-blocks 17, rods 20, ex-

tending from said bar down to eccentricyokes 21, and eccentrics 22, embraced by said yokes and fixed on a shaft 23, mounted to retate in the main frame and provided with an operating-handle 24. The face of the bar 19 which bears on the die-blocks and the corresponding faces of said blocks are or may be vertical; but the rear face of said bar and the corresponding face it bears on are inclined or beveled, as clearly shown in Fig. 5, so that when the shaft 23 is turned and the eccentrics draw down the bar 19 the bar is driven forward sufficiently to clamp fast the die-blocks wherever they may be set. It will be noted that as the parts are metal and fit snugly a very slight movement of the bar 19 will suffice to effect the clamping. Indeed, the blocks 17 do not move at all in clamping.

The punches 25 may be cylindrical, and each punch plays freely but snugly through a bore in a guide-block 26. These blocks have each a horizontally-disposed dovetail groove in its back, whereby it is fitted snugly but slidably on a supporting-bar 27, secured to the table 2. This bar hasadovetail tongue 28, which engages the grooves in the guideblocks, and this construction permits said blocks to be moved into position so as to bring the punches directly over the dies. When once adjusted, the guide-blocks are clamped fast by a beveled clamping-bar 29,- which occupies a recess in the beveled edge of the tongue 28 and when drawn backward or outward by a rod 30 clamps the blocks fast to said tongue. The rod 30 is coupled to the yoke 31 of an eccentric 32 on a shaft 33, mounted in hearings on the table or the supportingbar and provided with an operating-handle 34. Only one eccentric, strap, and rod has been described; but there will be several by preference, as shown in Fig. 4:.

The punches 25 are carried and operated by punch-carriers 35, each of which has a recess 36 in its face to take in the head 25 of the punch, the recess having at its lower part a contracted slot to receive a neck 25 on the punch. Each punch-carrier has also a wicket 37, pi votally mounted on its face to close over said recess 36, and a dovetail groove 38 in its top which engages a dovetail tongue on a block 39, this latter having a T-shaped tongue 39, which fits into and plays slidably in a groove 40 in the lower edge of the sliding frame 11. By the adjustment of this block 39 along the groove 40 the punch-carriers may be brought into proper position over the respective punch-guides or guide-blocks 26, and by the sliding connection of the carriers 35 with the blocks 39 the carriers may be pushed back to free the punches from the recesses 36 and allow the punches to be lifted or drawn out of the guide-blocks 26. It will be understood that the carriers 35 and blocks 39 are left always free to move, no clamping devices being necessary for holding them in position. A screw 41 in the carrier or some similar detent device prevents the carrier from being pushed too far back by impinging on the block 39. The operating tip or end 25 of the punch and the aperture in the die 18 may have any form or dimensions desired.

In preparing the machine for work any desired number of die-blocks 17 will be put in, spaced as desired, and clamped fast. The proper number of punch-guides 26 will then be adjusted with reference to the dies, this being done by first pushing back all the carriers 35 and passing the punches down through their guides and into the respective dies. The guides 26 are now clamped fast, the carriers 35 shifted into position and drawn out so that the heads of the punches engage the recesses in their faces, and the wickets 37 closed.

In the operation of the punch the roof of the recess 36 in the carrier 35 drives down the punch when the frame 11 descends, and the walls of the slot of said recess take under the shoulders formed at the neck of the punch and lift or withdraw the latter.

The face of the frame 11 sets back far enough to permit the punches to be lifted out of their guides.

Obviously the piece 14 might be made integral with the table 2, and it may be so considered, though it is more convenient to construct it as a separate part. The bar 27 and the punch-guides 26 are elevated sufficiently (see Fig. 5) to permit the material to be punched to pass under them.

The wicket 37 is to prevent the carrier 35 from shifting back free of the punch during the operation of the machine, and any other means for preventing this may be employed as well.

The clutch device 7 forms no part of the present invention and will not need to be described. Indeed, any suitable clutch may be employed if the pulley be driven continuously; but the machine may be operated without any clutch and by hand, if desired.

The machine as herein illustrated shows the punches as moving up and down or vertically; but this is not at all important to my invention. Obviously they might operate horizontally or at any angle, so far as my invention is concerned.

Fig. 9 shows a slightly-different form of the devices for clamping the die blocks and punch-guides. In this construction the clamping-bar 29 is set in the lower side-of the clovetail guide 28, and the bar. 19 which clamps the series of die-blocks, moves in horizontally in clamping and enters a recess in the side of the block. The latter is depressed or drawn down in clamping as distinguished from the lateral pressure as applied by the bar 19. (Seen in Fig. 5.) It is desirable that the clamping pressure in the case of the die-block and punch-guide shall be applied in the same direction. Obviously the bar 19 may be situated at the front sides of the die-blocks instead of at the back, as in Fig. 5.

Having thus described my invention, I claim 1. In a punching-machine, the combination with the slotted bed, and a die-block mounted in and slidable along said slot, of a beveled clamping-bar situated in a recess between said block and a wall on the bed, and means for drawing said bar into said recess for clamping the die-block laterally in said slot.

2. In apunching-machine, the combination with a slotted bed, and a plurality of dieblocks mounted in and slidable along said slot, of a wedge-like clamping-bar situated in a recess extending along said slot and having one of its faces bearing on the sides of said blocks, and means for drawing said bar into said recess, whereby said blocks are clamped and held in place by lateral pressure.

3. In apunching-machine, the combination with a supporting-bar, and a punch-guide slidable along said bar, of a beveled, wedgelike clam ping-bar situated in a recess in said supporting-bar and bearing laterally on said punch-guide, and means for operating said clamping-bar to clamp the punch-guide to its support.

4. In a punching-machine, the combination with a supporting-bar, a plurality of punchguides slidably mounted on a dovetail tongue on said bar, of means for simultaneously clamping all of said guides to said bar.

5. In a punchingmachine, the combination with a slotted bed, a plurality of die-blocks mounted slidably in said slot, and means for simultaneously clamping fast said blocks when set, of a supporting-bar parallel with the slot in the bed, a plurality of punch-guides mounted slidably on said bar in operative relation to said die-blocks, and means for simultaneously clamping said guides to their support when set.

6. In a punching-machine, the combination with a slotted bed, a plurality of die-blocks mounted slidably in said slot, and means for simultaneously clamping fast said blocks when set, of a supporting-bar parallel with the slot in the bed, a plurality of punch-guides mounted slidably 011 said bar in operative relation to said die-blocks, means for simultaneously clamping said guides to their support when set, the punches, and adjustable means for driving and withdrawing said punches.

'7. In a punching-machine, the combination with a reciprocating frame for operating the punches, of punch-carriers mounted on said frame and slidable in two directions thereon, individually-adjustable punch-guides, and punches in said guides and controlled by said carriers, substantially as set forth.

8. In a punching-machine, the combination with a reciprocating part for operating the punches, individually adjustable punchguides through which the punches play, and the said punches,of the punch-carriers mounted on said reciprocating part and movable in two directions thereon, said carriers having means for driving and withdrawing the punches, substantially as set forth.

9. In a punching-machine, the combination with a laterally-adjustable punch-guide, a punch adapted to play through the same, and a reciprocating frame or part for driving and withdrawing the punch, of a punch-carrier 35, mounted slidably forward and back on said reciprocating part and adapted to loosely engage the head of the punch, substantially as set forth.

10. In a punching-machine, the combination with an adj ustable punch-guide, a punch adapted to play through said guide, and a reciprocating frame or part for driving and withdrawing the punches, of a punch-carrier 85, having in its face a recess36 to receive the head of the punch, anda block 39, mounted slidably laterally in said reciprocating frame, said carrier being mounted slidably on said block 39 so that it may be moved forward and back, substantially as set forth.

11. In a punching-machine, the cornbina tion with an adjustable punchguide, a punch 25 adapted to play through said guide and having a head 25 and neck 25", and a reciprocating frame or part for driving and withdrawing the punches, of a punch carrier mounted slidably on said reciprocating part and having in one of its faces a recess to receive the head of the punch and a movable stop to prevent the escape of the punch from said recess, substantially as set forth.

12. In a punching-machine, the combination with a bed, a plurality of die-blocks mounted slidably along the same, aclamp ing-bar mounted on the bed and adapted to engage the several blocks, and'means for operating said bar to clamp all of the blocks simultaneously.

In witness whereof I have hereunto signed my name, this 19th day of March, 1900, in the presence of two subscribing witnesses.

EDWIN B. STIMPSON.

Witnesses:

HENRY CONNETT, PETER A. Boss. 

